CN103553025B - The close raising method of body of fine graphite goods - Google Patents
The close raising method of body of fine graphite goods Download PDFInfo
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- CN103553025B CN103553025B CN201310477762.6A CN201310477762A CN103553025B CN 103553025 B CN103553025 B CN 103553025B CN 201310477762 A CN201310477762 A CN 201310477762A CN 103553025 B CN103553025 B CN 103553025B
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Abstract
The invention discloses a kind of close raising method of body of fine graphite goods, comprise following measures: adopt conveying belt to transmit calcining starting material, and once pulverizing and separating twice all carry out under sealing condition, Pipeline transport is adopted to add labor and materials in addition, control the pollution of impurity ash to greatest extent, make whole production process total ashes be less than less than 0.2%; Adopt circular furnace roasting, and whitewash on the inwall of circular furnace, control the inwall gap of circular furnace, the velocity of discharge of volatile matter is controlled; Dipping process adopts circulation to give hot method, make fine graphite goods give thermal technology's sequence is heated evenly consistent.Described whitewashing adopts shotcrete machine to carry out, and material spray is carried out converting material preparation in the ratio of 3:3:4 by aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog.The present invention improves the conveying link of traditional technology, roasting link and dipping link, ensures that fine graphite goods reach 1.80g/cm
3body close, improve quality product and Business Economic Benefit.
Description
technical field:
The present invention relates to a kind of common fine graphite goods, particularly relate to a kind of close raising method of body of fine graphite goods.
background technology:
Common fine graphite is through specific production process and obtained ceramic.It has 40 years history as an industry in China.But development is very fast, application is quite extensive, relates to multiple fields such as metallurgy, chemical industry, electronics, machinery, electrician, communications and transportation, aviation, nuclear power and biotechnology.The technological standards two that its production of articles has been approved in the industry by row soaks two roasting product volume densities at 1.73-1.75g/cm
3.Along with the demand in market increases, product competition is fierce, and high-density, the goods of high strength are more and more subject to the welcome in market and the favor of user.How, on the basis of original technique, impel the upgrading that its body is close, and develop be received by the market product, ensure that its goods two soak product and reach 1.80g/cm
3body close, be the current problem demanding prompt solutions of people.
summary of the invention:
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, provide a kind of technique simple, be convenient to implement and the close raising method of body of effective fine graphite goods.
Technical scheme of the present invention is: a kind of close raising method of body of fine graphite goods,
(1) conveying belt is adopted to transmit calcining starting material, and once pulverizing and separating twice all carry out under sealing condition, adopt Pipeline transport to add labor and materials in addition, control the pollution of impurity ash to greatest extent, make whole production process total ashes be less than less than 0.2%;
(2) adopt circular furnace roasting, and whitewash on the inwall of circular furnace, control the inwall gap of circular furnace, the velocity of discharge of volatile matter is controlled;
(3) dipping process adopts circulation to give hot method, make fine graphite goods give thermal technology's sequence is heated evenly consistent.
Described whitewashing adopts shotcrete machine to carry out, and material spray is carried out converting material preparation in the ratio of 3:3:4 by aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog, and shotcrete thickness is 2-5mm.Described shotcrete machine is made up of air compressor machine and grouting pump, and shower nozzle adopts the shower nozzle of 5-20mm.Aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog are poured in agitation vat, adds suitable quantity of water, fully stir with Handheld mixer, become scattered paste shape.Impregnating equipment comprises hot oil furnace, hot oil pipeline, regulated valve, heating thermal oil coil pipe preheating chamber; Thermal oil, under hot oil pump effect, flows through hot oil pipeline, carries out thermal cycling, reaches circulating-heating.Heating temperature is regulated by the deep fat valve be arranged in pipeline, and preheating chamber surrounding light-weight insulating brick is incubated, and thermal oil circulating-heating makes Heating temperature at about 250 DEG C.Heating thermal oil coil pipe preheating chamber is formed through rolling machine coiling by weldless steel tube, and the distance controlling between tube and tube within 20mm, and determines preheating chamber height according to the cage of impregnating autoclave dipped goods.
The invention has the beneficial effects as follows:
1, the present invention improves the conveying link of traditional technology, roasting link and dipping link, ensures that fine graphite goods reach 1.80g/cm
3body close, improve quality product and Business Economic Benefit.
2, roasting circular furnace of the present invention adopts inwall whitewashing (high-alumina cement, refractory mortar) leakage stopping technology to control gap, the velocity of discharge of volatile matter is made to obtain effective control, improve goods coking rate, the volume density of baked article is improved, and waste gas discharge capacity reduces in a large number in roasting process, economic benefit and obvious environment benefit.
3, the present invention has certain spraying pressure due to during whitewashing, and pasty slurry can be directly injected in the gap of more than 2mm and go, and reaches plugging effect, but due to during roasting when heat expansion, volatilization powder under the effect of negative pressure, can be discharged in tiny gap in the same old way.
4, the present invention is owing to adding aluminosilicate cement (high-alumina cement), refractory mortar powder (life) in batching, at circular furnace firing stage, due to the progressively rising of temperature, and lumps, is attached on stove inwall, serves the effect of leak stopping, and difficult drop-off.
5, thermal oil heating tech of the present invention can ensure that Heating temperature is at about 250 DEG C, can meet the requirement of dipping pre-heating technique completely.In addition, adopt thermal oil circulating-heating safe and reliable, non-maintaining, need not be on duty, Heating temperature homogeneous constant.
6, dipping process of the present invention have employed circulation and gives hot method, ensure goods give thermal technology's sequence is heated evenly consistent.Through graphitizable high temperature process, achieve the close upgrading of fine graphite goods body.
7, the present invention changes conveying belt into by hand haulage and transmits calcining starting material, once pulverizes and achieves line seal operation, and kneading transform Pipeline transport pitch as, rolls sheet, automatically cooling, automatic storage continuously.Separating twice also achieves seal operation, Pipeline transport powder, and storage powder controls the pollution of impurity ash to greatest extent automatically, ensures that whole production process total ashes is less than less than 0.2%.
8, in the present invention circular furnace inwall whitewashing leakage stopping technology have practical, simple to operate, efficiency is high, production cost is low and the feature of environmental protection and energy saving, during it efficiently solves circular furnace roasting, the fugitive constituent velocity of discharge is too fast, cause article construction to loosen, the close decline of body, easily produce the problem of a large amount of waste products, Application Areas is extensive, deeply favor by market, be easy to promotion and implementation, there is good economic benefit.
embodiment:
The close raising method of body of fine graphite goods, comprises following measures:
(1) conveying belt is adopted to transmit calcining starting material, and once pulverizing and separating twice all carry out under sealing condition, adopt Pipeline transport to add labor and materials in addition, control the pollution of impurity ash to greatest extent, make whole production process total ashes be less than less than 0.2%;
(2) adopt circular furnace roasting, and whitewash on the inwall of circular furnace, control the inwall gap of circular furnace, the velocity of discharge of volatile matter is controlled;
(3) dipping process adopts circulation to give hot method, make fine graphite goods give thermal technology's sequence is heated evenly consistent.
Whitewashing adopts shotcrete machine to carry out, and material spray is carried out converting material preparation in the ratio of 3:3:4 by aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog, and shotcrete thickness is 2-5mm.
Shotcrete machine is made up of air compressor machine and grouting pump, and shower nozzle adopts the shower nozzle of 5-20mm.Aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog are poured in agitation vat, adds suitable quantity of water, fully stir with Handheld mixer, become scattered paste shape.
Impregnating equipment comprises hot oil furnace, hot oil pipeline, regulated valve, heating thermal oil coil pipe preheating chamber; Thermal oil, under hot oil pump effect, flows through hot oil pipeline, carries out thermal cycling, reaches circulating-heating.
Heating temperature is regulated by the deep fat valve be arranged in pipeline, and preheating chamber surrounding light-weight insulating brick is incubated, and thermal oil circulating-heating makes Heating temperature at about 250 DEG C.
Heating thermal oil coil pipe preheating chamber is formed through rolling machine coiling by weldless steel tube, and the distance controlling between tube and tube within 20mm, and determines preheating chamber height according to the cage of impregnating autoclave dipped goods.
Principle of work: point generic hexagonal system of graphite in crystallography, is made up of the netted aspect of many carbon atoms superimposed mutually.Its graphite wafer lattice structure is perfect theoretically, and the raw-material composition moderate purity that is forming graphite product is higher, and the graphite lattice sophistication of graphite product internal structure is higher, and the close increase of its body, intensity increases thereupon.But, producing the impurity ash content entering excess in links, goods can be made in the carbon atom dot matrix of graphite to be mingled with foreign atom, though be still difficult to get rid of totally, as Fe through pyroprocessing
2o
3,b etc.Certainly will increase production cost increasing environmental as carried out purification, so reduce the existence of fine graphite goods ash impurities, be the first step of the close upgrading of body.The present invention controls the pollution of impurity ash to greatest extent, makes whole production process total ashes be less than less than 0.2%.
Roasting be green article under certain temperature condition, the decomposition that coal-tar pitch carries out, cyclisation aromizing, a series of combined processes of polycondensation building-up reactions.Greatly, volatile matter speed of overflowing is accelerated, and cause article construction to loosen, hole just rolls up, and causes the close decline of body, the containment volatile matter velocity of discharge, and control volatile matter output becomes on calcining process affects the close important ring of body in existing circular furnace gap.
For coal tar recovering, the volatile matter of discharging under identical condition is in the past after static tar precipitating, the coal-tar pitch oil obtained is monthly about 3.5-4 ton, and after adopting whitewashing, the asphalt oil monthly obtained now only has 200-300kg, effective control of volatile matter, the coking carboloy residue of goods is increased to about 55%, and the volume density of baked article is improved.One roasting is by original 1.4g/cm
3left and right rises to 1.45-1.50g/cm
3, two roastings are by 1.6g/cm
3rise to 1.65-1.70g/cm
3, three roastings reach 1.76g/cm
3above, and waste gas discharge capacity reduces in a large number in whole roasting process, not only remarkable in economical benefits, and environmental benefit is also fairly obvious.
Raw product after baking, because coal-tar pitch part in roasting process resolves into gas effusion, except pitch turns to except pitch coke at interiors of products, still form at interiors of products the small pore that many irregular and pore sizes differ, if the total porosity of graphite product is about 23%, the existence of porosity, its volume density must be affected, for ensureing dipping rate of body weight gain, have employed circulation and giving hot method, ensure goods give thermal technology's sequence is heated evenly consistent.In addition, high pressure, condition of high vacuum degree flood, and high pressure remains on 1.2mpa, and condition of high vacuum degree remains on more than 0.096mpa, and product dipping effect puts in place, increases weight more satisfactory, ensure that the prerequisite of the close lifting of goods body.After two leachings, finally through graphitizable high temperature process, fine graphite product volume density reaches 1.80g/cm
3, achieve promoting the close expection imagination of fine graphite goods body.
Claims (4)
1. the close raising method of the body of fine graphite goods, is characterized in that:
(1) conveying belt is adopted to transmit calcining starting material, and once pulverizing and separating twice all carry out under sealing condition, adopt Pipeline transport to add labor and materials in addition, control the pollution of impurity ash to greatest extent, make whole production process total ashes be less than less than 0.2%;
(2) circular furnace roasting is adopted, and whitewash on the inwall of circular furnace, control the inwall gap of circular furnace, the velocity of discharge of volatile matter is controlled, described whitewashing adopts shotcrete machine to carry out, material spray is carried out converting material preparation in the ratio of 3:3:4 by aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog, and shotcrete thickness is 2-5mm;
(3) dipping process adopts circulation to give hot method, and make fine graphite goods thermal technology's sequence be heated evenly consistent giving, impregnating equipment comprises hot oil furnace, hot oil pipeline, regulated valve, heating thermal oil coil pipe preheating chamber; Thermal oil, under hot oil pump effect, flows through hot oil pipeline, carries out thermal cycling, reaches circulating-heating; Heating temperature is regulated by the deep fat valve be arranged in pipeline, and preheating chamber surrounding light-weight insulating brick is incubated, and thermal oil circulating-heating makes Heating temperature at 250 DEG C.
2. the close raising method of the body of fine graphite goods according to claim 1, is characterized in that: described shotcrete machine is made up of air compressor machine and grouting pump, and shower nozzle adopts the shower nozzle of 5-20mm.
3. the close raising method of the body of fine graphite goods according to claim 1, it is characterized in that: aluminosilicate cement, refractory mortar powder raw material and refractory mortar powder grog are poured in agitation vat, add suitable quantity of water, fully stir with Handheld mixer, become scattered paste shape.
4. the close raising method of the body of fine graphite goods according to claim 1, it is characterized in that: heating thermal oil coil pipe preheating chamber is formed through rolling machine coiling by weldless steel tube, distance controlling between tube and tube within 20mm, and determines preheating chamber height according to the cage of impregnating autoclave dipped goods.
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| CN201310477762.6A CN103553025B (en) | 2013-10-14 | 2013-10-14 | The close raising method of body of fine graphite goods |
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| CN201310477762.6A CN103553025B (en) | 2013-10-14 | 2013-10-14 | The close raising method of body of fine graphite goods |
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| CN103553025B true CN103553025B (en) | 2015-11-25 |
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| CN105272371B (en) * | 2015-10-10 | 2017-12-26 | 大同新成新材料股份有限公司 | A kind of unqualified graphite impregnation product preheat dipping method again |
| CN106495695A (en) * | 2016-11-04 | 2017-03-15 | 南通贝思特石墨设备有限公司 | A kind of method for improving graphite-pipe thermal conductivity |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344133A (en) * | 2011-07-26 | 2012-02-08 | 大同市新成特炭有限公司 | Method for preparing fine particles high-density graphite product and open type circular calcinator |
| CN102502603A (en) * | 2011-11-01 | 2012-06-20 | 雅安恒圣高纯石墨科技有限责任公司 | Production process of large isotropic and isostatic high purity graphite with fine particles |
| CN202575985U (en) * | 2012-01-10 | 2012-12-05 | 王维明 | Ring type roasting furnace |
| CN102838108A (en) * | 2012-06-16 | 2012-12-26 | 淄博大陆炭素有限责任公司 | Minor-structure high-density graphite product and preparation method thereof |
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- 2013-10-14 CN CN201310477762.6A patent/CN103553025B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102344133A (en) * | 2011-07-26 | 2012-02-08 | 大同市新成特炭有限公司 | Method for preparing fine particles high-density graphite product and open type circular calcinator |
| CN102502603A (en) * | 2011-11-01 | 2012-06-20 | 雅安恒圣高纯石墨科技有限责任公司 | Production process of large isotropic and isostatic high purity graphite with fine particles |
| CN202575985U (en) * | 2012-01-10 | 2012-12-05 | 王维明 | Ring type roasting furnace |
| CN102838108A (en) * | 2012-06-16 | 2012-12-26 | 淄博大陆炭素有限责任公司 | Minor-structure high-density graphite product and preparation method thereof |
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